\section{District Heating }\label{district-heating}

When the user is not interested in a plant simulation or there is some centralized source of hot water, the following model can be used in the input.~ This allows the user to achieve a simulation without specifying operating parameters or curve fits for boiler models.~ This model only needs the connections to the loop and the nominal capacity to simulate.~ See the InputOutput Reference for additional information (Object: DistrictHeating:Water and DistrictHeating:Steam).~ DistrictHeating:Water calculates the output capacity necessary from the inlet temperature to the setpoint temperature for that loop with the given mass flow rate in Watts.~ DistrictHeating:Steam calculates the mass flow rate of steam and the output capacity necessary from the inlet condensate to the saturated steam for that loop.
